<template>
  <div class="sidebar">
    <el-menu
      class="sidebar-el-menu"
      :default-active="onRoutes"
      :collapse="collapse"
      background-color="#334256"
      text-color="#ffffff"
      active-text-color="#20a0ff"
      router
    >
      <template v-for="item in items">
        <el-menu-item :index="item.index" :key="items.key">
          <i :class="item.icon"></i>
          {{item.title}}
        </el-menu-item>
      </template>
    </el-menu>
  </div>
</template>

<script>
  import bus from '../assets/js/bus'
  export default {
    data() {
      return {
        collapse: false,
        items: [
          {
            icon: 'el-icon-document',
            index: 'Info',
            title: '系统首页'
          },
          {
            icon: 'el-icon-document',
            index: 'Consumer',
            title: '用户管理'
          },
          {
            icon: 'el-icon-document',
            index: 'Singer',
            title: '歌手管理'
          },
          {
            icon: 'el-icon-document',
            index: 'SongList',
            title: '歌单管理'
          }

        ]
    }
    },
    computed: {
      onRoutes() {
        return this.$route.path.replace("/","")
      }
    },
    created () {
      // 通过bus进行组件间的通信，来折叠侧边栏
      bus.$on('collapse', msg => {
        this.collapse = msg
      })
    }
  }
</script>

<style scoped>
    .sidebar{
      display: block;
      position: absolute;
      left: 0;
      top: 70px;
      bottom: 0;
      background: #334256;
      overflow-y: scroll;
    }
  .sidebar::-webkit-scrollbar {
    width: 0;
  }
  .sidebar-el-menu:not(.el-menu--collapse){
    width: 150px;
  }
  .sidebar>ul{
    height: 100%;
  }
</style>


